behind him. Some in the crowd booing. You remember this image of traffic on the George Washington bridge. Lanes closed by Christie's aides to punish a local politician. Tonight the appointee who ordered the closure said he had prove the governor knew what he said. Tonight what the governor's office is now saying. Here's ABC's Reena nine. Reporter: In a super bowl ceremony in New York's times square, New Jersey governor Chris Christie said nothing about the latest controversy, but some in the audience -- All of our partners -- Reporter: -- A mix of cheers and boos. The allegation that he lied coming from Christie's high school friend, David wildstein the former transportation official who ordered the lane closures. He said the New Jersey governor new of the forced lane closures of the George Washington bridge as it was happening. Back in December Christie said that wasn't the case and January 9th, he still maintained learning about the closure after it was over. I had no knowledge of this, of the planning, the execution, or anything about it. And that I first found out about it after it was over. Reporter: Doggedly repeating that defense during a press conference that lasted almost two hours. I was blindsided. I had no knowledge, or involvement in this issue. I knew nothing about this. Nobody called and told me anything. Reporter: Friday in a letter obtained by ABC news, wildstein's lawyer said he had evidence that existed tygue knowledge during the period the lanes were closed. Wildstein's attorney said his client wants to talk in exchange for immunity. Christie's office issued a statement maintaining he has absolutely no prior knowledge of the lane closures. But what did the New Jersey governor know during the closures? Christie took the stage last night to introduce bon jovi at a 60th birthday party for radio host, Howard Stern. No mention of the controversy. ABC news obtained a letter Christie sent to friends and family. The governor still maintained he learned the lanes on the bridge were closed from the press. Thank you, Reena. The headline in the west, the historic drought in

This transcript has been automatically generated and may not be 100% accurate.

Now Playing: Former Chris Christie Official Paints New Picture of Bridge Scandal